Drop jet in crossflow: ALE/Finite Element Simulations and interfacial effects.

• Ano de defesa: 2015
• Autor(a) principal: Oliveira, Gustavo Charles Peixoto de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade do Estado do Rio de Janeiro; Centro de Tecnologia e Ciências::Faculdade de Engenharia; BR; UERJ; Programa de Pós-Graduação em Engenharia Mecânica
• Palavras-chave em Português: Mechanic Engineering; Jet in Crossflow; Arbitrary Lagrangian-Eulerian; Finite Element; Two-Phase Flow; Periodic Boundary Conditions; Engenharia Mecânica; Jato Transversal; Lagrangeano-Euleriano Arbitrário; Elementos Finitos; Escoamento bifásico; Condições de Contorno Periódicas; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/11666

A two-phase flow computational code taking a hybrid Arbitrary Lagrangian-Eulerian desciption of movement along with the Finite Element Method is used to simulate the dynamics of an incompressible drop jet in crossflow in the primary breakup zone. Dispersed entities are described by means of a front-tracking method which produces zero-thickness interfaces through contiguous element meshing and adaptive refinement techniques. Periodic boundary conditions are implemented in a variationally consistent way for all the scalar fields involved in the presented simulations and amodified version of the pressure field is added to the one-fluid formulation employed in the momentum equation. Three-dimensional direct numerical simulations for different flow configurations of immiscible liquids pertinent to experimental results found in literature. Analyses of the hydrodynamics of the drop jet in crossflow in these configurations considering trajectories, drop shape variations, spectrum of small disturbances, besides additional aspects relating to mesh quality are presented and discussed.